Return instance of Autocomplete for the first matched element if called without arguments.

spec/autocompleteBehavior.js

@@ -373,4 +373,16 @@ describe('Autocomplete', function () {
         expect(input.data('autocomplete')).toBeUndefined();
         expect(div.children().length).toBe(0);
     });
+
+    it('Should return Autocomplete instance if called without arguments', function () {
+        var input = $(document.createElement('input'));
+
+        input.autocomplete({
+            serviceUrl: '/test-dispose'
+        });
+
+        var instance = input.autocomplete();
+
+        expect(instance instanceof $.Autocomplete).toBe(true);
+    });
 });

src/jquery.autocomplete.js

@@ -611,9 +611,15 @@
 
     // Create chainable jQuery plugin:
     $.fn.autocomplete = function (options, args) {
+        var dataKey = 'autocomplete';
+        // If function invoked without argument return
+        // instance of the first matched element:
+        if (arguments.length === 0) {
+            return this.first().data(dataKey);
+        }
+
         return this.each(function () {
-            var dataKey = 'autocomplete',
-                inputElement = $(this),
+            var inputElement = $(this),
                 instance = inputElement.data(dataKey);
 
             if (typeof options === 'string') {